Lynnwood · Snohomish County
Backflow testing in Lynnwood
Lynnwood requires every backflow assembly to be registered with the City and tested every year — plus after repairs, replacement, relocation, or a backflow incident. Incomplete reports aren’t accepted, so we fill out every line.
Lynnwood Public Works program
How Lynnwood’s backflow program works
The short version, summarized from the utility’s own cross-connection control materials.
Source: City of Lynnwood Public Works · verified October 2026 ↗Assemblies must be registered with the City of Lynnwood.
Testing is required on installation, annually, and after repairs, replacement, relocation or a backflow incident.
Failed assemblies must be repaired and retested; incomplete documentation makes a test unacceptable.
Report submission
Lynnwood accepts reports by email or through its online Backflow Preventer Inspection and Field Test Report form. We file it for you.
Questions for the utility: LynnwoodCCC@Lynnwoodwa.gov · (425) 670-5200
On the ground
What we see in Lynnwood
Every city’s housing stock and commercial mix shapes what’s in the meter box.
Retail & restaurants
Alderwood and the Highway 99 corridor are dense with food service, salons and medical offices — classic RP territory. We test before you open so you never lose a business hour.
Neighborhoods
Serving all of Lynnwood
Some unincorporated addresses with a Lynnwood mailing address are served by Alderwood Water & Wastewater District. Your bill will say which.
- City Center
- Alderwood
- Highway 99 corridor
- Meadowdale
- Lund’s Gulch
- Scriber Lake
- North Lynnwood
FAQ
Lynnwood backflow questions
01 Who can test my backflow assembly in Lynnwood?
02 How do backflow test reports get submitted to Lynnwood Public Works?
03 How much does backflow testing cost in Lynnwood?
04 What if my assembly fails in Lynnwood?
Field test report · next due
Lynnwood test due? We’ll handle it.
Book online in two minutes. We test, repair if needed, and file the report with your water utility — and remind you next year.